Among these startups, Yoshi stands out as a frontrunner. The company has expanded from three cities to 16 in the past year, raising more than $15 million in funding — including support from ExxonMobil and General Motors Ventures. Yoshi hasn't revealed how many people have signed up for the service, according to the Washington Post, but it currently delivers gas in Chicago, Los Angeles, Boston, Houston, and other US cities.

Yoshi's fuel comes from ExxonMobil, and customers pay a $20 monthly fee for delivery. The startup also offers services like oil changes and wiper blade swaps, and customers get per gallon discounts on their gas if they choose these add-ons.

Customers can schedule these services and communicate with "field technicians" who complete them through an app, available on Apple and Android.

The startup asks customers to leave their fuel door ajar, but drivers do not need to be present while Yoshi employees work on their car. Yoshi can also install a magnetic fuel vault in compatible cars, making it possible to complete a fill-up without customers having to leave the fuel door open.

Yoshi Image

Yoshi

In addition to Yoshi, several other gas delivery startups are trying to expand their reach. Silicon Valley-based Filld delivers fuel to customers in the Bay Area and Seattle, and Booster Fuels says its service is safe and more eco-friendly than traditional gas stations.

As these companies gain more followers, some fire marshals and fire department officials have expressed concerns about startups transporting large amounts of a flammable liquid on the back of a pickup truck.

“Some of the [companies] are using 1,000-gallon tanks,” Greg Andersen, a division chief in the state fire marshal's office in California, told The Guardian. “If they’re going into the basement parking lot of a high rise, that actually is a large concern.”

Yoshi sometimes delivers gas to parking lots and high-rises, but the startup says its fuel tanks are certified by the US Department of Transportation and adhere to local laws, according to the Post.

The startup has not experienced any gas spill accidents since launching in 2015, and Yoshi intends to begin delivering gas to nine more cities by the end of the year. According to its website, people can save 33 hours and $240 a year by using it.